[Haskell-cafe] Finally tagless and ghc-extensions
Günther Schmidt
gue.schmidt at web.de
Wed Oct 28 21:14:42 EDT 2009
Hi all,
ok, I haven't let go on the EDSL subject just yet. I'm still digesting the
"Finally Tagless" approach from Oleg, Jacques and Chen.
In both, the JFP & APLAS paper, the authors note that no fancy type
extension are needed for this approach. But in almost every (Haskell)
example that is a bit more involved the authors do make use of functional
dependencies and / or type families. GADTs are also being used, although
*not* in the syntax definition but merely in the semantic instances, I'm
cool with that :) .
I haven't touched base yet with either functional dependencies nor type
families as I understand the edges on neither are yet worked out, so I'd
prefer being able to avoid either when using the tagless approach even in
more involved settings.
Is that possible?
Günther
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